Level



July 13 I1926.

v E. B. L. HAGSTRM LEVEL Filed sept. 1 7. 1924 INVENTOR.

Patented July 13d, 1926. p

.UNITED STATES inane Parser orriice.

ERIK BERNHARD LAURENTIUS HAGSTRM, OF BORGVATTNET, S-WEDEN.

LEVEL.

Application :filed September 17,1324, Serial No. 738,291, and in Sweden July y27, 1923.

f The present invention relates to levels and has for its main object to' provide a level which is easily and with greataccuracy adjustable in any desired angle in relation to theirame of the level.A i

A further object of the invention is to provide means by which the level proper readily can be secured in any inclining position relatively to the frame of the level.

Another object of thevin'vention is to provide means by `which the inclining position of the level proper can be read oil'. y

Other objects oi the invention are made clear by thelollowing description with rei erence to accompanying drawings illustran ting two embodiments of the invention.

In the drawings Figure 1 is a side elevation or the level according to the one embodiment. Figure 2'is a section on the line lql in Figure 1.y

Referring now to the accompanying drawings .vherein like and corresponding parts are designated bysimilar reference characters throughout the level comprises an annular casing divided diametrically in two partsl and 2. The lower part 1 forms the trame of the level and to this part the one end of the guard-shaped part 2 is hinged by means of a pin o r pivot 3. The other end of the guard 2 is formedrwith aV plate l having a hole or recess (not shown)v for the reception of a screw 5 fixed to the frame 1. By means of a nut 6 co-operating with the screw 5 and the plate 4 the guard 2 may be secured in operative position as shown in the drawing. ln the space betweenthe parts 1 and 2 an externally circular and prererably annular member 7 is rotatably arranged and engages with the parts 1 and 2 by means of flanges '8 co-operating with llanges 9 on the said parts. By these llanges the lateral movement of the member? in the rotation thereof is prevented. By means of the guard 2 the member 7 may be fixed in the rot-ary position in which it has been adjusted. The member 7 is on diametrically opposite sides provided with oblong holes 10 (Figure 2) receiving the ends of the level proper 11. The member 7 is provided with a groove 71 formed round the said member and interrupted by portions 12 located on opposite sides of the level 11 and forming each the seat for a screw 13 by which the level 11 is held in position. The inner ends of the screws 13 carry plates 14 which are rotatably mounted on the screws and which may be plane or curved according to the shape .or the level l1. These plates are designed to distribute the pressure of thel screws 13 against the level 11 on'a large ce. By means el the screws 13 the ends the level 11 may beraised or lowered and said level thereby adjusted to the proper position in relation to the member 7. In order to protect the level 11 an elastic sub"- stance, for instance-plates 141 of rubber or the like may be applied between the plates lll- ;-end the level 11.

The sidesot the annular.member? are recessed as shown at 15 and these sides also mvv be provided with grooves or the like in order to get a goed hold of the member in the manipulation thereof.

Cin the sides of the traine 1 and.' if desired, also on the guard 2 scales 16 are etched or engraved and co-operate with a mark 1'1" on the member 7.

The frame l is formed with horizontal supporting plates 18 pro-vided with countersunk holes 197or wood-screws or the like. Besides, the trame isprovided with vertical supporting plates 2O with counter-sunk holes 21 and at the bottom 0f the frame with aV pin 22 designed to prevent the lateral displacement of the device when the level is fastened occasionally to a surface plate or the like. In such a use of the level alsothe screws 23 may be employed. These screws are adapted to be screwed into wood without any need of special tools andare adjacent to their heads provided with metalthreads 23a by means of which they can be f screwed into correspondingly threadedholes 2e in the plates 18 when the level is not in use. Instead of these special screws, naturally, also ordinary wood-screws may be employed. Such screws also may be substituted by resilient guards or the like arranged in such a manner that the level may be fastened occasionally on the side of a surface plate wherebythe semi-circular recess in the edge of said plate for the reception of the iframe of the level is not required.

Ii" the level be designed to be fixed permanently to a block or the like of the wellknown kind the screws 23 and the pin 22 may be dispensed with. Likewise, the lateral supporting plates 20 may be dispensed with if the level be designed to be used occasionally only on a surface plate or the like. In order to enable the reading oft' of the level from above in horizontal leveling the part 2 and the member 7 may be provided with holes of suitable size and shape.

If the level 11 is t0 be replaced .or adjusted so that the level shows horizontal position when the mark 17 indicates zero on the scale 16 and the supporting plates 18 rest upon surfaces disposed in the same horizontal plane the nut 6 is unscrewed and the member 7 Vremoved from the frame 1 whereupon thescrews 13 become accessible.

'I do not limit my invention to the embodimentsabove described but want to vary :the details thereof without interfering with `the scope of the invention.

What I claim is:-

1. A level lcomprising a frame having a semi-circularrecess formed therein an annularmember adapted'to be seated within the re- .cess of said frame, bearing portions arranged diametrically opposite in a vgroove formed within rthe Vperiphery of said annular memb er, a level tube seated within said 'bearing portions, locking means extending through said :bearing portion for retaining said level tube in position, a semi-circular guard member, 'flanges formed `with said annular member and ,cooperating with said frame and guard member for preventing lateral movement thereof, one end Iof said guard memberbeingfhingedly connected to said frame, a "zplate formed with the `opposite or `free end ofsaid guard member being 'adjustably connected rtoV said Yframe whereby rotary movement kof lsaid annular member maybe limited and said vannular member may be `vertically removed from the recess of said iframe when ithe ,guard member is in open position. c

12. ,A level comprising a frame'having a semi-circular recess :formed therein, hori `seated within the recess of said frame, a

level tube supported by said annular member, a .semi-circular guard member, flanges formed with said annular member and cooperating with said gframe and guard member 'for preventing lateral movement thereof, one end of said guard member being hingedly connected to said frame, and means for adjustably connecting the `opposite end yof said guard member to said frame whereby rotary movement of said annular member may be prevented and the latter removed from the frame when said guard member is in open fposition.

3. A level comprising a sectional frame, an annular member rotatably mounted within said frame, a level tube extending diametrically through ksaid annular member land adjustably vsupported therein, a scale vprovided upon the lower section of said frame, a mark provided upon said annular member and adapted to cooperate `with the zero mark of said s cale, flanges formed with the sections of said frame and adapted to engage over said annular member to prevent lateral movement 4of the latter. the upper section of said frame having one endhingedly connected to one end of the lower section thereof, and means for adjustably rconnecting the opposite ends of `the sections of said frame whereb)7 said annular member may be retained against rotation.

In Vwitness ywhereof I have hereunto set my hand.

ERlKiBERNHARD LAURENTIUS HAGSTROM. 

